I don't know why WIKI doesn't have it, but it was also a religious symbol of some American Indians. The Europeans were trying to market Indian rugs, but the Indian designs were not selling nearly as well as the ones from the Orient and Europe, so the Westeners introduced to the Indians the symbols that they are now associated with. One of those being a swastika. The Indians then incorparated those symbols into their culture and religion. It is funny, because all the "Indian" designs you see come from either the Orient or Europe. Those were not the design that Indians originally made on the stuff, but ones introduced by westerners to increase the value of their trade goods. Found that rather funny. :P